Process of making couplings for sucker rods and the like



F. W.-AXTELL April 8, 1930. I

PROCESS OF MAKING COUPLINGS FOR SUCKER RODS AND THE LIKE Filed se t. '26.. 1927 3 Q S I Wumww a mbv F"'I I I I L I I I I I l l I I l I I 2 z a g INVENTOR ll-allllfl I LW AXTELL,

I. L I I I l I III I!!! If .X MAF ATTORNEYS.

Patented Apr. 8, 1930 UNITED STATES- PATENT oFslcE FRED AXTEDL, 01' FORT. WORTH, TEXAS PBOGESS or-mm G OOQ'PLINGB FOR SUCKEB RODS AND TEE LIKE Applieatlonfled September 88, 1927. Serial No. 281,989.

drawings which form a part of this app 'cation. Fig. 1 shows a longitudinal section of a piece of pipe which is to be formed with the cou ling members at its ends.

igs. 2 and 3 show two pieces of rod which are to be inserted in the ends of the pipe.

Fig. 4 shows the rods and pipe assembled to be formed with coupling members at the ends.

Fig. 5 illustrates the same parts after the rods and pipe have been welded together and up-set preparatory to being cored and threaded to make the finished product.

Fig. 6 shows the complete product, partly in section.

Fig. 7 is a cross-section, taken on the hue 7-7 of Fig. 6.

Similar characters of reference are used to indicate the same parts throughout the several views.

This invention relates to a product which is made of a ipe and smaller rods which are inserted in t e pipe at the ends thereof to form coupling portions on the ends of the pipe which are integralwith the pipe. A pipe 1 of the required length is selected.

come integral by welding are up-set by hammering on the ends of the welded portionsuntil they are ap roximatel of the le h and size shown in. igs. 5 an 6. The wel ed portions are further formed into portions 3 which are square in cross-section for the ieces of rod 2 are driven in the ends of the purposes of making the sucker rods easily engggsd by a wrench of ordinary type when the r are to be coupled and uncoupled. The enlarged members 4. and 5 have become solid metal by the process of heating and upsetting or hammering, and areready to be completed. The end portion 5 is bored. out at the end and threaded to form the female end ortion of the rod. The member 4 is reduce to the I form shown in Fig. 6 and threaded exteriorly to form the male end of the sucker rod. In

reducing the portions 3 to the form, square in cross-section, the rods 2 are more securely retained in the ends of the pipe 1 because there are shoulders 6 formed at each end of the end portions 3. There are exterior shoulders 6 on the rods 2 and interior shoulders 6 1n the filpe 1. Each pipe or section of a sucker r0 thus has coupling members on the ends thereof which cannot be removed. The sucker'rods are thus reduced in the number of parts to be handled and this makes the impzpved sucker rods of practical commercial v no.

It is apparent that various changes in sizes,

lengths, and proportions may be made with out departing from my invention.

Another a vantage of this invention is that thehollow sucker rods are made air and water tight. The displacement of the water by the hollow pipe is of commercial value because the suc er rods are made lighter by the buo ant effect of .the vacuum in the pipe.

at I claim is v 1. A process of making air and water tight pipe couplings for suckervrods which consists in selecting 9. pi ofrequired length, driving rods in the en of the pipe, heatin the pipe ends with the re therem. to wel mg point, upsetting the ends of the com 'bined pipe and rods to enlarge the same, re-

ducing a portion of one of the enlarged members and threading to form the male coup and boring out the other enlarged mom 1- and threading it interiorly to form the female end of the coupling.

2. A process of making air and. water tight pipe couplings for sucker rods which consists in selectmg a pi e of required length, driving rods in the on of the pipe, heating the pipe ends with the rods therein to welding point, upsetting the ends of the combined pi e and rods endwise to enlarge the same ra 'ally, reducing a portion of one of the enlarged members and threading the reduced portion to form the male coupling, boring out the other enlarged member and threading it interiorly to form the female end of the coupling.

3. A process of making air and water tight pipe couplings for sucker rods which consists in selecting a pipe of required length, driving rods in the ends of the pipe, heating the ends of the pipe with the rods therein to welding point, upsetting the ends of the combined pipe and rods endwise to enlarge the same radially, threadin a portion of one enlarged member to form the male coupling, borin out the other enlar ed member and threading it interiorly to orm the female coupling, and reducing portions of the reds and pipe to members square in cross-section to form engaging members and to form shoulders to prevent separation of the rods and Pipe. 7

4. A process of making air and water tight pipe couplings for sucker rods which consists in selectmg a pipe of required length, driving rods in the ends of the pipe, heating the ends of the pipes and the rods therein to welding point, welding the rods and pipe to an'integral mass and upsetting the same to form enlarged end members and reducing ortions of the combined rods and ipe adacent to said enlarged members to orm engaging members and to form shoulders on the respective rods and in the pipes to prevent removal.

In testimony whereof, I set my hand, this 20th day of September, 1927.

FRED w. AXTELL. 

